Only for the PS4 as Sony, if I am not mistaken, owns a huge chunk in the blu ray business and gets royalties for entertainment using blu ray format (I believe I got this info from one of Squilliam's posts).
For this reason, I don't see the NextBox and Mii using blu ray. Why fund one of your main competitors?
HD DVD for the NextBox and Mii is my safest choice, but we may be surprised with both Microsoft and Nintendo. I could see Microsoft trying to position Live as the console version of Steam and Nintendo doing it's own format, but this is just speculation.







